Steam-engine valve



(No Model.)

A. L. IDE.

STEAM ENGINE VALVE.

Patented June 2, 1885.

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ALBERT L. IDE, OF SPRINGFIELD, ILLINOIS.

STElVlwENGINE VALVE.

.QI-SPECIFICATION forming part of Letters Patent No. 319,261, dated June 2, 1885.

Application filed February 7, 1885. (No model.)

To all whom it may concern:

Be it known that I, ALBERT L. IDE, ofv

Springfield, in the county of Sangamon and State of Illinois, have invented certain new and useful fImprovements in Steam-Engine Valves; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

rllhis invention relates to an improved construction in that class of steam-engine valves known as hollow piston valves; and it consists in the matters hereinafter described, and pointed out in the appended claim.

The invention is herein illustrated in connection with a stationary horizontal engine similar to one shown and described in an application, Serial No. 125, 67 2, filed by the present applicant upon the 27th day of March, 18S/1, but the features of improvement herein pointed out and claimed may be used equally Well in connection with other forms of steamengines than the one herein illustrated.

The valve herein illustrated is of the type known as hollow-piston7 valve, and consists of a hollow tube having enlarged portions or pistons at either end, which are fitted to cylindric valveseats, said valve-seats, as an improved construction, being provided with steel bushings, affording the bearingsnrfaces for the valve, as will hereinafter more fully appear.

VThe invention may be more fully understood by reference to the accompanying drawings, in which Figure l is a side view of an engine, the cylinder and steam-chest thereof being shown in section. Fig. 2 is an enlarged detail section of the steam-chest, showing the improved construction of the valve seats. Fig. 3 is a view of the slide-valve detached.

A indicates the main frame or bed of the engine, and B is the cylinder thereof, which is secured horizontally at one end of the frame, so as to overhang the latter. C is the crankn shaft, havingl suitable bearings in the end of the frame A., and which is, as shown, provided with a cranlrdisk, C', having a crank-pin, c, and also with a balance-wheel, G2. The cylinder B is provided with a piston, E, of any ordinary or preferred construction, to which is attached a piston-rod, E', which is pro` vided with a cross-head, F, constructed to operate in guides G and G', formed upon the engine-frame, said piston-rod being connected with the crank-pin c by means of a connecting-rod, F', in the usual manner.

H is the valve-easing or steamfchest, which is preferably located beneath the cylinder, and is provided with a slide-valve, I, which is of the form known as hollowpiston77 valve, and may be operated from a suitable eccentric upon the main shaft, in the manner shown, for instance, in the application No. 125,672, above referred to, or otherwise, through the medium of a rock-shaft, J, which is provided with an upwardly-projecting arm connected with the eccentric-rod of the engine, and a downwardly-projecting arm, J', which is connected with the said valve by means of a valve-rod, I', and connecting-rod I". The steam chest H is, as before described, located below the cylinder, and communicates therewith by steam passages or ports h, connected with annular passages h', formed in the inner faces of cylindrical seats H', formed in the casting composing the steam-chest, at either end of the latter.

As an improved construction in the valve.- seats, the surfaces against which the annular bearingsurfaces i ofthe valves I, operate are formed by separate annular rings or bush` ings M, which are fitted into the seats H', and are provided with a series of steam ports or apertures, m, arranged opposite the passages h in the stationary .parts of the valve-casing. The said bushings are preferably held from displacement at their inner edges by means of annular projections h2, formed at the inner margins of the seats H', and are held from outward movement by heads or caps H2 H3, which close the openings formed by the valveseats at either end of the steam-chest, and are provided with inwardly projecting flanges constructed to rest against the outer edges of the bushings. The head H2 is provided, as herein shown, with a stuffing-box, It', through which the valve-rod I' passes,and the head H3 is constructed to afford attachment for 'the exhaustpipe H", as clearly shown in Fig. 1.

Important advantages arising from the use of the bushings M described are that the ports m may be easily and conveniently constructed IOO , The ports mare preferably made straight upon their sides at which the steam is first admitted when they are uncovered by the valve, in Order to' give a maximum initial steam-inlet and a quick cut-off, and the opposite or exhaust sides of the ports are curved, in order toincrease the area of the bearingsurfaces adjacent to the ports and to give greater strength t0 the connecting-bars m' between the ports. The enlarged annular bearing-surfaces i of the valve I are preferably made considerably Wider than the ports, and are provided With a packing consisting of a steel spring-ring, i', preferably made Wider than Y the port, so that, in connection with the crossbars m, fwhich operate to guide and support the pistons of the valves as they pass over the ports, liability of the edge of the ring to catch upon the edges'of the ports is entirely obviated. The interior of the steam-chest H in its portion between thevalve-seats is preferably hollowed out or recessed toa point below said seats, as indicated at h4 yin Fig. 2, so as to receive any dirt or grit that may come over from the boiler, and to thereby prevent injury to the valve therefrom. Such recess also remains illed with oil, and thus insures a constant lubrication of the slide-valve and its seat.

I claim as my inventionlThe-combination, with a cylindrical valve, and a valve-chest provided with cylindrical seats having continuous annular steam-passages h, of removable bushings having a series of apertures forming steam-ports, said apertures being straight upon the inlet-sides 45 of thc'ports and curved upon the opposite or exhaust sides, substantially as described.

In testimony that I claim the foregoing `as my invention I affix my signature in presence oftwo witnesses.

ALBERT L. IDE. Witnesses:

ADOLPH F. DEICKEN, E. W. PAYNE. 

